smtplib рассылает за раз не все почты (максимум 100 почему то)

Использую aiosmptlib для рассылок в тг боте. При отправке за раз отправляется почему то только 100 писем максимум (в gmail в скрытой копии столько показывает). Респонс отправки говорит что слишком много получателей, хотя в лимитах gmail сказано, что до 500 в день, как это можно обойти?

Вот класс рассылки:

class MailingService():
    def __init__(self) -> None:
        self._client = SMTP(hostname='smtp.gmail.com', port=587)

    async def connect(self, username: EmailStr, password: str) -> None:
        await self._client.connect(
            start_tls=True,
            validate_certs=False,
            username=username,
            password=password,
        )
    
    async def send_email(self, sender: EmailStr, recipients: Sequence[EmailStr], email: MIMEMultipart) -> None:
        async with self._client as client:
            await client.sendmail(sender, recipients, email.as_string())
            await client.quit()
    
    async def attach_audio(self, audio_data: BytesIO, filename: str, email: MIMEMultipart) -> MIMEMultipart:
        file = MIMEBase('audio', 'mp3')
        file.set_payload(audio_data.read())
        encoders.encode_base64(file)
        file.add_header('content-disposition', 'attachment', filename=filename)
        email.attach(file)
        return email

    async def compose_email(
        self,
        body: Optional[str],
        subject: Optional[str],
        sender: EmailStr,
        email: MIMEMultipart
    ) -> MIMEMultipart:
        email['Subject'] = subject
        email['From'] = sender
        email.attach(MIMEText(body, "plain", "utf-8"))
        return email

хендлер:

for recipient_group in splitted_recipients:
        email_id = await email_service.get_email_id(user_id=user_id, email=recipient_group[0])
        audio_list = await audio_service.get_auto_mailing_audio(user_id=user_id, email_indexes=email_id)
        user = await user_service.get_user(user_id=user_id)

        msg = MIMEMultipart()
        msg = await mailing_service.compose_email(
            body=settings.email_text,
            subject=settings.email_subject,
            sender=user.personal_email,
            email=msg
        )

        for audio in audio_list:
            filename = audio.name
            file = await bot.get_file(audio.file_id)
            audio_data = await bot.download_file(file.file_path)
            msg = await mailing_service.attach_audio(audio_data=audio_data, filename=filename, email=msg)

        password = await user_service.get_user_password(user_id=user_id)
        await mailing_service.connect(username=user.personal_email, password=password)
        await mailing_service.send_email(sender=user.personal_email, recipients=recipient_group, email=msg)

sendmail response:

(452, b"4.5.3 Your message has too many recipients. For more information regarding\n4.5.3 Google's sending limits, go to\n4.5.3  https://support.google.com/mail/?p=TooManyRecipientsError - gsmtp")